What is added to an edentulous impression tray to enhance comfort and accuracy?

The addition of a utility wax border to an edentulous impression tray serves multiple purposes that enhance both comfort and accuracy during the impression-taking process. This wax is typically applied around the perimeter of the tray, creating a softer and more comfortable edge that minimizes irritation to the patient’s gums and tissues.

In terms of accuracy, the utility wax helps to create a better seal around the impression tray when seated in the mouth. This seal prevents material from escaping during the impression process, thereby ensuring that the impression captures the anatomical contours of the edentulous ridge more precisely. The result is a more detailed and accurate impression, which is crucial for the fabrication of dentures or other dental appliances.

In contrast, while padding on the handle may assist in grip and comfort for the dental professional using the tray, it does not directly impact the comfort of the patient or the accuracy of the impression itself. Similarly, while extra impression material can provide additional coverage, it does not directly enhance the overall fit or comfort that the utility wax border offers. Anterior cushioning material, while potentially beneficial for some types of impressions, does not serve the same multifunctional role as a utility wax border for edentulous impressions.